Explanation:
The visible light coming from celestial bodies from space are affected most by the atmosphere. The visible light suffer blurring and absorption. So, to avoid such situation optical telescopes are kept in mountains where atmosphere is thin.
Whereas radio signal are not affected by the atmosphere so, they need not be placed in mountains.However, it is affected by various noises from the man made devices. So, to avoid these noises radio telescopes are kept in deep valleys.
Answer:
The speed of the cart and clay after the collision is 50 cm/s .
Explanation:
Given :
Mass of lump , m = 500 g = 0.5 kg .
Velocity of lump , v = 30 cm/s .
Mass of cart , M = 1 kg .
Velocity of cart , V = 60 cm/s .
We know by conservation of momentum :
Here , is the speed of the cart and clay after the collision .
Putting all value in above equation .
We get :
Hence , this is the required solution .
Answer:
1. increase
Explanation:
Mass is proportional to gravity. The bigger two objects are, the stronger the force of gravity between them will be.